This Pen Vibrates When You Make Spelling Mistake

Of course, this pen involves some German crazy engineering. This pen has electronics that packs a stripped down version of Linux, with a non-optical motion sensors which work when you are writing on the paper or just air-writing. There's also a calligraphy mode which will give you ruthless feedback to improve your penmanship.
The project's looking to raise ~$181,476 and if you want this pen for yourself or your kids, you should head over to the source link and contribute at least $150. But for the rest of us, who love the sophisticated algorithms to fix our spellings free of cost, just watch this video in action-